Standby Generator Calculator
Plan your whole-house backup power. Select from our extensive database of appliances to calculate the exact kilowatt size needed for your home.
Advertisement
Add Your Home's Loads
Recommended Generator
0
kW
Total Running Load
0 kW
Starting Surge (Peak)
0 A
Est. Amps @ 240V
0 A
High Load: Requires a liquid-cooled generator (25kW+). Standard air-cooled units typically top out at 26kW.
Running Cost Estimate
$
per Therm
Hourly Cost:
$0.00
*Based on typical consumption for a 20kW unit.
Advertisement
Whole House vs. Managed Power
Whole House Coverage
The generator is sized to run everything in your house simultaneously. You don't have to worry about what's turned on.
- Requires larger generator (22kW - 48kW+)
- Often requires liquid-cooled engine
- Maximum comfort and convenience
Managed Power (Load Shedding)
Uses a smart transfer switch to turn off low-priority heavy loads (like an electric dryer or 2nd AC) when the generator is near capacity.
- Allows a smaller generator (14kW - 24kW)
- Usually air-cooled (lower maintenance)
- Most cost-effective solution
Recommended Standby Equipment
Essential gear for a complete and reliable home backup system.
As an Amazon Associate, I earn from qualifying purchases.